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Change CSS Class Of Selected Item Using Angular 2

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[前端(javascript) 所属分类 前端(javascript) | 发布者 店小二04 | 时间 2016 | 作者 红领巾 ] 0人收藏点击收藏

When you provide an option to select an item in list of items then you must show the difference between selected items and un-selected items. To show this difference, changing in the background color or text color of selected item is necessary. The user must recognise the items that are select-able, To implement this feature we need to change the background-color or text-color on mouse over. Lets do this with example.

Source Code DEMO

CSS

Here selectedItem class will give background color to selected item

.menu_selectedItem { background-color:#dfdfdf; } .menu_hoverItem:hover { background-color:#eeeeee; } .menu_item { padding:12px; border:1px solid #ccc; cursor:pointer; }

Markup

When user clicks on item, we will save that index value in selectedIndex variable. If the selectedIndex value is equal to current index of item menu_selectedItem class will be added that item.

<div (click)="selectItem(ind)" [ngClass]="{'menu_item':true, 'menu_hoverItem': (selectedIndex !== ind), 'menu_selectedItem': (selectedIndex === ind) }" *ngFor="let item of items; let ind = index"> {{item}} </div> Script - app.component.ts

Here observe selectItem function

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